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Diffstat (limited to 'src/mscorlib/src/System/Convert.cs')
-rw-r--r-- | src/mscorlib/src/System/Convert.cs | 2703 |
1 files changed, 0 insertions, 2703 deletions
diff --git a/src/mscorlib/src/System/Convert.cs b/src/mscorlib/src/System/Convert.cs deleted file mode 100644 index 0cd3c5d715..0000000000 --- a/src/mscorlib/src/System/Convert.cs +++ /dev/null @@ -1,2703 +0,0 @@ -// Licensed to the .NET Foundation under one or more agreements. -// The .NET Foundation licenses this file to you under the MIT license. -// See the LICENSE file in the project root for more information. - -/*============================================================ -** -** -** -** Purpose: Home for static conversion methods. -** -** -===========================================================*/ - -using System; -using System.Globalization; -using System.Threading; -using System.Reflection; -using System.Runtime.CompilerServices; -using System.Runtime.InteropServices; -using System.Runtime.Versioning; -using System.Security; -using System.Diagnostics; -using System.Diagnostics.Contracts; - - -namespace System { - - [Flags] - public enum Base64FormattingOptions { - None = 0, - InsertLineBreaks = 1 - } - - // Returns the type code of this object. An implementation of this method - // must not return TypeCode.Empty (which represents a null reference) or - // TypeCode.Object (which represents an object that doesn't implement the - // IConvertible interface). An implementation of this method should return - // TypeCode.DBNull if the value of this object is a database null. For - // example, a nullable integer type should return TypeCode.DBNull if the - // value of the object is the database null. Otherwise, an implementation - // of this method should return the TypeCode that best describes the - // internal representation of the object. - // The Value class provides conversion and querying methods for values. The - // Value class contains static members only, and it is not possible to create - // instances of the class. - // - // The statically typed conversion methods provided by the Value class are all - // of the form: - // - // public static XXX ToXXX(YYY value) - // - // where XXX is the target type and YYY is the source type. The matrix below - // shows the set of supported conversions. The set of conversions is symmetric - // such that for every ToXXX(YYY) there is also a ToYYY(XXX). - // - // From: To: Bol Chr SBy Byt I16 U16 I32 U32 I64 U64 Sgl Dbl Dec Dat Str - // ---------------------------------------------------------------------- - // Boolean x x x x x x x x x x x x x - // Char x x x x x x x x x x - // SByte x x x x x x x x x x x x x x - // Byte x x x x x x x x x x x x x x - // Int16 x x x x x x x x x x x x x x - // UInt16 x x x x x x x x x x x x x x - // Int32 x x x x x x x x x x x x x x - // UInt32 x x x x x x x x x x x x x x - // Int64 x x x x x x x x x x x x x x - // UInt64 x x x x x x x x x x x x x x - // Single x x x x x x x x x x x x x - // Double x x x x x x x x x x x x x - // Decimal x x x x x x x x x x x x x - // DateTime x x - // String x x x x x x x x x x x x x x x - // ---------------------------------------------------------------------- - // - // For dynamic conversions, the Value class provides a set of methods of the - // form: - // - // public static XXX ToXXX(object value) - // - // where XXX is the target type (Boolean, Char, SByte, Byte, Int16, UInt16, - // Int32, UInt32, Int64, UInt64, Single, Double, Decimal, DateTime, - // or String). The implementations of these methods all take the form: - // - // public static XXX toXXX(object value) { - // return value == null? XXX.Default: ((IConvertible)value).ToXXX(); - // } - // - // The code first checks if the given value is a null reference (which is the - // same as Value.Empty), in which case it returns the default value for type - // XXX. Otherwise, a cast to IConvertible is performed, and the appropriate ToXXX() - // method is invoked on the object. An InvalidCastException is thrown if the - // cast to IConvertible fails, and that exception is simply allowed to propagate out - // of the conversion method. - - // Constant representing the database null value. This value is used in - // database applications to indicate the absense of a known value. Note - // that Value.DBNull is NOT the same as a null object reference, which is - // represented by Value.Empty. - // - // The Equals() method of DBNull always returns false, even when the - // argument is itself DBNull. - // - // When passed Value.DBNull, the Value.GetTypeCode() method returns - // TypeCode.DBNull. - // - // When passed Value.DBNull, the Value.ToXXX() methods all throw an - // InvalidCastException. - - public static class Convert { - - //A typeof operation is fairly expensive (does a system call), so we'll cache these here - //statically. These are exactly lined up with the TypeCode, eg. ConvertType[TypeCode.Int16] - //will give you the type of an Int16. - internal static readonly RuntimeType[] ConvertTypes = { - (RuntimeType)typeof(System.Empty), - (RuntimeType)typeof(Object), - (RuntimeType)typeof(System.DBNull), - (RuntimeType)typeof(Boolean), - (RuntimeType)typeof(Char), - (RuntimeType)typeof(SByte), - (RuntimeType)typeof(Byte), - (RuntimeType)typeof(Int16), - (RuntimeType)typeof(UInt16), - (RuntimeType)typeof(Int32), - (RuntimeType)typeof(UInt32), - (RuntimeType)typeof(Int64), - (RuntimeType)typeof(UInt64), - (RuntimeType)typeof(Single), - (RuntimeType)typeof(Double), - (RuntimeType)typeof(Decimal), - (RuntimeType)typeof(DateTime), - (RuntimeType)typeof(Object), //TypeCode is discontinuous so we need a placeholder. - (RuntimeType)typeof(String) - }; - - // Need to special case Enum because typecode will be underlying type, e.g. Int32 - private static readonly RuntimeType EnumType = (RuntimeType)typeof(Enum); - - internal static readonly char[] base64Table = {'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O', - 'P','Q','R','S','T','U','V','W','X','Y','Z','a','b','c','d', - 'e','f','g','h','i','j','k','l','m','n','o','p','q','r','s', - 't','u','v','w','x','y','z','0','1','2','3','4','5','6','7', - '8','9','+','/','=' }; - - private const Int32 base64LineBreakPosition = 76; - -#if _DEBUG - private static bool TriggerAsserts = DoAsserts(); - private static bool DoAsserts() { - Debug.Assert(ConvertTypes!=null, "[Convert.cctor]ConvertTypes!=null"); - Debug.Assert(ConvertTypes.Length == ((int)TypeCode.String + 1), "[Convert.cctor]ConvertTypes.Length == ((int)TypeCode.String + 1)"); - Debug.Assert(ConvertTypes[(int)TypeCode.Empty]==typeof(System.Empty), - "[Convert.cctor]ConvertTypes[(int)TypeCode.Empty]==typeof(System.Empty)"); - Debug.Assert(ConvertTypes[(int)TypeCode.String]==typeof(String), - "[Convert.cctor]ConvertTypes[(int)TypeCode.String]==typeof(System.String)"); - Debug.Assert(ConvertTypes[(int)TypeCode.Int32]==typeof(int), - "[Convert.cctor]ConvertTypes[(int)TypeCode.Int32]==typeof(int)"); - return true; - } -#endif - - public static readonly Object DBNull = System.DBNull.Value; - - // Returns the type code for the given object. If the argument is null, - // the result is TypeCode.Empty. If the argument is not a value (i.e. if - // the object does not implement IConvertible), the result is TypeCode.Object. - // Otherwise, the result is the type code of the object, as determined by - // the object's implementation of IConvertible. - [Pure] - public static TypeCode GetTypeCode(object value) { - if (value == null) return TypeCode.Empty; - IConvertible temp = value as IConvertible; - if (temp != null) - { - return temp.GetTypeCode(); - } - return TypeCode.Object; - } - - // Returns true if the given object is a database null. This operation - // corresponds to "value.GetTypeCode() == TypeCode.DBNull". - [Pure] - public static bool IsDBNull(object value) { - if (value == System.DBNull.Value) return true; - IConvertible convertible = value as IConvertible; - return convertible != null? convertible.GetTypeCode() == TypeCode.DBNull: false; - } - - // Converts the given object to the given type. In general, this method is - // equivalent to calling the Value.ToXXX(value) method for the given - // typeCode and boxing the result. - // - // The method first checks if the given object implements IConvertible. If not, - // the only permitted conversion is from a null to TypeCode.Empty, the - // result of which is null. - // - // If the object does implement IConvertible, a check is made to see if the - // object already has the given type code, in which case the object is - // simply returned. Otherwise, the appropriate ToXXX() is invoked on the - // object's implementation of IConvertible. - public static Object ChangeType(Object value, TypeCode typeCode) { - return ChangeType(value, typeCode, Thread.CurrentThread.CurrentCulture); - } - - public static Object ChangeType(Object value, TypeCode typeCode, IFormatProvider provider) { - if (value == null && (typeCode == TypeCode.Empty || typeCode == TypeCode.String || typeCode == TypeCode.Object)) { - return null; - } - - IConvertible v = value as IConvertible; - if (v == null) { - throw new InvalidCastException(Environment.GetResourceString("InvalidCast_IConvertible")); - } - - // This line is invalid for things like Enums that return a TypeCode - // of Int32, but the object can't actually be cast to an Int32. - // if (v.GetTypeCode() == typeCode) return value; - switch (typeCode) { - case TypeCode.Boolean: - return v.ToBoolean(provider); - case TypeCode.Char: - return v.ToChar(provider); - case TypeCode.SByte: - return v.ToSByte(provider); - case TypeCode.Byte: - return v.ToByte(provider); - case TypeCode.Int16: - return v.ToInt16(provider); - case TypeCode.UInt16: - return v.ToUInt16(provider); - case TypeCode.Int32: - return v.ToInt32(provider); - case TypeCode.UInt32: - return v.ToUInt32(provider); - case TypeCode.Int64: - return v.ToInt64(provider); - case TypeCode.UInt64: - return v.ToUInt64(provider); - case TypeCode.Single: - return v.ToSingle(provider); - case TypeCode.Double: - return v.ToDouble(provider); - case TypeCode.Decimal: - return v.ToDecimal(provider); - case TypeCode.DateTime: - return v.ToDateTime(provider); - case TypeCode.String: - return v.ToString(provider); - case TypeCode.Object: - return value; - case TypeCode.DBNull: - throw new InvalidCastException(Environment.GetResourceString("InvalidCast_DBNull")); - case TypeCode.Empty: - throw new InvalidCastException(Environment.GetResourceString("InvalidCast_Empty")); - default: - throw new ArgumentException(Environment.GetResourceString("Arg_UnknownTypeCode")); - } - } - - internal static Object DefaultToType(IConvertible value, Type targetType, IFormatProvider provider) { - Contract.Requires(value != null, "[Convert.DefaultToType]value!=null"); - if (targetType==null) { - throw new ArgumentNullException(nameof(targetType)); - } - Contract.EndContractBlock(); - - RuntimeType rtTargetType = targetType as RuntimeType; - - if (rtTargetType != null) - { - if (value.GetType() == targetType) - { - return value; - } - - if (rtTargetType == ConvertTypes[(int)TypeCode.Boolean]) - return value.ToBoolean(provider); - if (rtTargetType == ConvertTypes[(int)TypeCode.Char]) - return value.ToChar(provider); - if (rtTargetType == ConvertTypes[(int)TypeCode.SByte]) - return value.ToSByte(provider); - if (rtTargetType == ConvertTypes[(int)TypeCode.Byte]) - return value.ToByte(provider); - if (rtTargetType == ConvertTypes[(int)TypeCode.Int16]) - return value.ToInt16(provider); - if (rtTargetType == ConvertTypes[(int)TypeCode.UInt16]) - return value.ToUInt16(provider); - if (rtTargetType == ConvertTypes[(int)TypeCode.Int32]) - return value.ToInt32(provider); - if (rtTargetType == ConvertTypes[(int)TypeCode.UInt32]) - return value.ToUInt32(provider); - if (rtTargetType == ConvertTypes[(int)TypeCode.Int64]) - return value.ToInt64(provider); - if (rtTargetType == ConvertTypes[(int)TypeCode.UInt64]) - return value.ToUInt64(provider); - if (rtTargetType == ConvertTypes[(int)TypeCode.Single]) - return value.ToSingle(provider); - if (rtTargetType == ConvertTypes[(int)TypeCode.Double]) - return value.ToDouble(provider); - if (rtTargetType == ConvertTypes[(int)TypeCode.Decimal]) - return value.ToDecimal(provider); - if (rtTargetType == ConvertTypes[(int)TypeCode.DateTime]) - return value.ToDateTime(provider); - if (rtTargetType == ConvertTypes[(int)TypeCode.String]) - return value.ToString(provider); - if (rtTargetType == ConvertTypes[(int)TypeCode.Object]) - return (Object)value; - // Need to special case Enum because typecode will be underlying type, e.g. Int32 - if (rtTargetType == EnumType) - return (Enum)value; - if (rtTargetType == ConvertTypes[(int)TypeCode.DBNull]) - throw new InvalidCastException(Environment.GetResourceString("InvalidCast_DBNull")); - if (rtTargetType == ConvertTypes[(int)TypeCode.Empty]) - throw new InvalidCastException(Environment.GetResourceString("InvalidCast_Empty")); - } - - throw new InvalidCastException(Environment.GetResourceString("InvalidCast_FromTo", value.GetType().FullName, targetType.FullName)); - } - - public static Object ChangeType(Object value, Type conversionType) { - return ChangeType(value, conversionType, Thread.CurrentThread.CurrentCulture); - } - - public static Object ChangeType(Object value, Type conversionType, IFormatProvider provider) { - if( conversionType == null) { - throw new ArgumentNullException(nameof(conversionType)); - } - Contract.EndContractBlock(); - - if( value == null ) { - if(conversionType.IsValueType) { - throw new InvalidCastException(Environment.GetResourceString("InvalidCast_CannotCastNullToValueType")); - } - return null; - } - - IConvertible ic = value as IConvertible; - if (ic == null) { - if ( value.GetType() == conversionType) { - return value; - } - throw new InvalidCastException(Environment.GetResourceString("InvalidCast_IConvertible")); - } - - RuntimeType rtConversionType = conversionType as RuntimeType; - - if (rtConversionType==ConvertTypes[(int)TypeCode.Boolean]) - return ic.ToBoolean(provider); - if (rtConversionType==ConvertTypes[(int)TypeCode.Char]) - return ic.ToChar(provider); - if (rtConversionType==ConvertTypes[(int)TypeCode.SByte]) - return ic.ToSByte(provider); - if (rtConversionType==ConvertTypes[(int)TypeCode.Byte]) - return ic.ToByte(provider); - if (rtConversionType==ConvertTypes[(int)TypeCode.Int16]) - return ic.ToInt16(provider); - if (rtConversionType==ConvertTypes[(int)TypeCode.UInt16]) - return ic.ToUInt16(provider); - if (rtConversionType==ConvertTypes[(int)TypeCode.Int32]) - return ic.ToInt32(provider); - if (rtConversionType==ConvertTypes[(int)TypeCode.UInt32]) - return ic.ToUInt32(provider); - if (rtConversionType==ConvertTypes[(int)TypeCode.Int64]) - return ic.ToInt64(provider); - if (rtConversionType==ConvertTypes[(int)TypeCode.UInt64]) - return ic.ToUInt64(provider); - if (rtConversionType==ConvertTypes[(int)TypeCode.Single]) - return ic.ToSingle(provider); - if (rtConversionType==ConvertTypes[(int)TypeCode.Double]) - return ic.ToDouble(provider); - if (rtConversionType==ConvertTypes[(int)TypeCode.Decimal]) - return ic.ToDecimal(provider); - if (rtConversionType==ConvertTypes[(int)TypeCode.DateTime]) - return ic.ToDateTime(provider); - if (rtConversionType==ConvertTypes[(int)TypeCode.String]) - return ic.ToString(provider); - if (rtConversionType==ConvertTypes[(int)TypeCode.Object]) - return (Object)value; - - return ic.ToType(conversionType, provider); - } - - [MethodImpl(MethodImplOptions.NoInlining)] - private static void ThrowCharOverflowException() { throw new OverflowException(Environment.GetResourceString("Overflow_Char")); } - - [MethodImpl(MethodImplOptions.NoInlining)] - private static void ThrowByteOverflowException() { throw new OverflowException(Environment.GetResourceString("Overflow_Byte")); } - - [MethodImpl(MethodImplOptions.NoInlining)] - private static void ThrowSByteOverflowException() { throw new OverflowException(Environment.GetResourceString("Overflow_SByte")); } - - [MethodImpl(MethodImplOptions.NoInlining)] - private static void ThrowInt16OverflowException() { throw new OverflowException(Environment.GetResourceString("Overflow_Int16")); } - - [MethodImpl(MethodImplOptions.NoInlining)] - private static void ThrowUInt16OverflowException() { throw new OverflowException(Environment.GetResourceString("Overflow_UInt16")); } - - [MethodImpl(MethodImplOptions.NoInlining)] - private static void ThrowInt32OverflowException() { throw new OverflowException(Environment.GetResourceString("Overflow_Int32")); } - - [MethodImpl(MethodImplOptions.NoInlining)] - private static void ThrowUInt32OverflowException() { throw new OverflowException(Environment.GetResourceString("Overflow_UInt32")); } - - [MethodImpl(MethodImplOptions.NoInlining)] - private static void ThrowInt64OverflowException() { throw new OverflowException(Environment.GetResourceString("Overflow_Int64")); } - - [MethodImpl(MethodImplOptions.NoInlining)] - private static void ThrowUInt64OverflowException() { throw new OverflowException(Environment.GetResourceString("Overflow_UInt64")); } - - // Conversions to Boolean - public static bool ToBoolean(Object value) { - return value == null? false: ((IConvertible)value).ToBoolean(null); - } - - public static bool ToBoolean(Object value, IFormatProvider provider) { - return value == null? false: ((IConvertible)value).ToBoolean(provider); - } - - - public static bool ToBoolean(bool value) { - return value; - } - - [CLSCompliant(false)] - public static bool ToBoolean(sbyte value) { - return value != 0; - } - - // To be consistent with IConvertible in the base data types else we get different semantics - // with widening operations. Without this operator this widen succeeds,with this API the widening throws. - public static bool ToBoolean(char value) { - return ((IConvertible)value).ToBoolean(null); - } - - public static bool ToBoolean(byte value) { - return value != 0; - } - - - public static bool ToBoolean(short value) { - return value != 0; - } - - [CLSCompliant(false)] - public static bool ToBoolean(ushort value) { - return value != 0; - } - - public static bool ToBoolean(int value) { - return value != 0; - } - - [CLSCompliant(false)] - public static bool ToBoolean(uint value) { - return value != 0; - } - - public static bool ToBoolean(long value) { - return value != 0; - } - - [CLSCompliant(false)] - public static bool ToBoolean(ulong value) { - return value != 0; - } - - public static bool ToBoolean(String value) { - if (value == null) - return false; - return Boolean.Parse(value); - } - - public static bool ToBoolean(String value, IFormatProvider provider) { - if (value == null) - return false; - return Boolean.Parse(value); - } - - public static bool ToBoolean(float value) - { - return value != 0; - } - - public static bool ToBoolean(double value) - { - return value != 0; - } - - public static bool ToBoolean(decimal value) - { - return value != 0; - } - - public static bool ToBoolean(DateTime value) - { - return ((IConvertible)value).ToBoolean(null); - } - - // Disallowed conversions to Boolean - // public static bool ToBoolean(TimeSpan value) - - // Conversions to Char - - - public static char ToChar(object value) { - return value == null? (char)0: ((IConvertible)value).ToChar(null); - } - - public static char ToChar(object value, IFormatProvider provider) { - return value == null? (char)0: ((IConvertible)value).ToChar(provider); - } - - public static char ToChar(bool value) { - return ((IConvertible)value).ToChar(null); - } - - public static char ToChar(char value) { - return value; - } - - [CLSCompliant(false)] - public static char ToChar(sbyte value) { - if (value < 0) ThrowCharOverflowException(); - Contract.EndContractBlock(); - return (char)value; - } - - public static char ToChar(byte value) { - return (char)value; - } - - public static char ToChar(short value) { - if (value < 0) ThrowCharOverflowException(); - Contract.EndContractBlock(); - return (char)value; - } - - [CLSCompliant(false)] - public static char ToChar(ushort value) { - return (char)value; - } - - public static char ToChar(int value) { - if (value < 0 || value > Char.MaxValue) ThrowCharOverflowException(); - Contract.EndContractBlock(); - return (char)value; - } - - [CLSCompliant(false)] - public static char ToChar(uint value) { - if (value > Char.MaxValue) ThrowCharOverflowException(); - Contract.EndContractBlock(); - return (char)value; - } - - public static char ToChar(long value) { - if (value < 0 || value > Char.MaxValue) ThrowCharOverflowException(); - Contract.EndContractBlock(); - return (char)value; - } - - [CLSCompliant(false)] - public static char ToChar(ulong value) { - if (value > Char.MaxValue) ThrowCharOverflowException(); - Contract.EndContractBlock(); - return (char)value; - } - - // - // @VariantSwitch - // Remove FormatExceptions; - // - public static char ToChar(String value) { - return ToChar(value, null); - } - - public static char ToChar(String value, IFormatProvider provider) { - if (value == null) - throw new ArgumentNullException(nameof(value)); - Contract.EndContractBlock(); - - if (value.Length != 1) - throw new FormatException(Environment.GetResourceString(ResId.Format_NeedSingleChar)); - - return value[0]; - } - - // To be consistent with IConvertible in the base data types else we get different semantics - // with widening operations. Without this operator this widen succeeds,with this API the widening throws. - public static char ToChar(float value) - { - return ((IConvertible)value).ToChar(null); - } - - // To be consistent with IConvertible in the base data types else we get different semantics - // with widening operations. Without this operator this widen succeeds,with this API the widening throws. - public static char ToChar(double value) - { - return ((IConvertible)value).ToChar(null); - } - - // To be consistent with IConvertible in the base data types else we get different semantics - // with widening operations. Without this operator this widen succeeds,with this API the widening throws. - public static char ToChar(decimal value) - { - return ((IConvertible)value).ToChar(null); - } - - public static char ToChar(DateTime value) - { - return ((IConvertible)value).ToChar(null); - } - - - // Disallowed conversions to Char - // public static char ToChar(TimeSpan value) - - // Conversions to SByte - - [CLSCompliant(false)] - public static sbyte ToSByte(object value) { - return value == null? (sbyte)0: ((IConvertible)value).ToSByte(null); - } - - [CLSCompliant(false)] - public static sbyte ToSByte(object value, IFormatProvider provider) { - return value == null? (sbyte)0: ((IConvertible)value).ToSByte(provider); - } - - [CLSCompliant(false)] - public static sbyte ToSByte(bool value) { - return value? (sbyte)Boolean.True: (sbyte)Boolean.False; - } - - [CLSCompliant(false)] - public static sbyte ToSByte(sbyte value) { - return value; - } - - [CLSCompliant(false)] - public static sbyte ToSByte(char value) { - if (value > SByte.MaxValue) ThrowSByteOverflowException(); - Contract.EndContractBlock(); - return (sbyte)value; - } - - [CLSCompliant(false)] - public static sbyte ToSByte(byte value) { - if (value > SByte.MaxValue) ThrowSByteOverflowException(); - Contract.EndContractBlock(); - return (sbyte)value; - } - - [CLSCompliant(false)] - public static sbyte ToSByte(short value) { - if (value < SByte.MinValue || value > SByte.MaxValue) ThrowSByteOverflowException(); - Contract.EndContractBlock(); - return (sbyte)value; - } - - [CLSCompliant(false)] - public static sbyte ToSByte(ushort value) { - if (value > SByte.MaxValue) ThrowSByteOverflowException(); - Contract.EndContractBlock(); - return (sbyte)value; - } - - [CLSCompliant(false)] - public static sbyte ToSByte(int value) { - if (value < SByte.MinValue || value > SByte.MaxValue) ThrowSByteOverflowException(); - Contract.EndContractBlock(); - return (sbyte)value; - } - - [CLSCompliant(false)] - public static sbyte ToSByte(uint value) { - if (value > SByte.MaxValue) ThrowSByteOverflowException(); - Contract.EndContractBlock(); - return (sbyte)value; - } - - [CLSCompliant(false)] - public static sbyte ToSByte(long value) { - if (value < SByte.MinValue || value > SByte.MaxValue) ThrowSByteOverflowException(); - Contract.EndContractBlock(); - return (sbyte)value; - } - - [CLSCompliant(false)] - public static sbyte ToSByte(ulong value) { - if (value > (ulong)SByte.MaxValue) ThrowSByteOverflowException(); - Contract.EndContractBlock(); - return (sbyte)value; - } - - [CLSCompliant(false)] - public static sbyte ToSByte(float value) { - return ToSByte((double)value); - } - - [CLSCompliant(false)] - public static sbyte ToSByte(double value) { - return ToSByte(ToInt32(value)); - } - - [CLSCompliant(false)] - public static sbyte ToSByte(decimal value) { - return Decimal.ToSByte(Decimal.Round(value, 0)); - } - - [CLSCompliant(false)] - public static sbyte ToSByte(String value) { - if (value == null) - return 0; - return SByte.Parse(value, CultureInfo.CurrentCulture); - } - - [CLSCompliant(false)] - public static sbyte ToSByte(String value, IFormatProvider provider) { - return SByte.Parse(value, NumberStyles.Integer, provider); - } - - [CLSCompliant(false)] - public static sbyte ToSByte(DateTime value) - { - return ((IConvertible)value).ToSByte(null); - } - - // Disallowed conversions to SByte - // public static sbyte ToSByte(TimeSpan value) - - // Conversions to Byte - - public static byte ToByte(object value) { - return value == null? (byte)0: ((IConvertible)value).ToByte(null); - } - - public static byte ToByte(object value, IFormatProvider provider) { - return value == null? (byte)0: ((IConvertible)value).ToByte(provider); - } - - public static byte ToByte(bool value) { - return value? (byte)Boolean.True: (byte)Boolean.False; - } - - public static byte ToByte(byte value) { - return value; - } - - public static byte ToByte(char value) { - if (value > Byte.MaxValue) ThrowByteOverflowException(); - Contract.EndContractBlock(); - return (byte)value; - } - - [CLSCompliant(false)] - public static byte ToByte(sbyte value) { - if (value < Byte.MinValue) ThrowByteOverflowException(); - Contract.EndContractBlock(); - return (byte)value; - } - - public static byte ToByte(short value) { - if (value < Byte.MinValue || value > Byte.MaxValue) ThrowByteOverflowException(); - Contract.EndContractBlock(); - return (byte)value; - } - - [CLSCompliant(false)] - public static byte ToByte(ushort value) { - if (value > Byte.MaxValue) ThrowByteOverflowException(); - Contract.EndContractBlock(); - return (byte)value; - } - - public static byte ToByte(int value) { - if (value < Byte.MinValue || value > Byte.MaxValue) ThrowByteOverflowException(); - Contract.EndContractBlock(); - return (byte)value; - } - - [CLSCompliant(false)] - public static byte ToByte(uint value) { - if (value > Byte.MaxValue) ThrowByteOverflowException(); - Contract.EndContractBlock(); - return (byte)value; - } - - public static byte ToByte(long value) { - if (value < Byte.MinValue || value > Byte.MaxValue) ThrowByteOverflowException(); - Contract.EndContractBlock(); - return (byte)value; - } - - [CLSCompliant(false)] - public static byte ToByte(ulong value) { - if (value > Byte.MaxValue) ThrowByteOverflowException(); - Contract.EndContractBlock(); - return (byte)value; - } - - public static byte ToByte(float value) { - return ToByte((double)value); - } - - public static byte ToByte(double value) { - return ToByte(ToInt32(value)); - } - - public static byte ToByte(decimal value) { - return Decimal.ToByte(Decimal.Round(value, 0)); - } - - public static byte ToByte(String value) { - if (value == null) - return 0; - return Byte.Parse(value, CultureInfo.CurrentCulture); - } - - public static byte ToByte(String value, IFormatProvider provider) { - if (value == null) - return 0; - return Byte.Parse(value, NumberStyles.Integer, provider); - } - - public static byte ToByte(DateTime value) - { - return ((IConvertible)value).ToByte(null); - } - - - // Disallowed conversions to Byte - // public static byte ToByte(TimeSpan value) - - // Conversions to Int16 - - public static short ToInt16(object value) { - return value == null? (short)0: ((IConvertible)value).ToInt16(null); - } - - public static short ToInt16(object value, IFormatProvider provider) { - return value == null? (short)0: ((IConvertible)value).ToInt16(provider); - } - - public static short ToInt16(bool value) { - return value? (short)Boolean.True: (short)Boolean.False; - } - - public static short ToInt16(char value) { - if (value > Int16.MaxValue) ThrowInt16OverflowException(); - Contract.EndContractBlock(); - return (short)value; - } - - [CLSCompliant(false)] - public static short ToInt16(sbyte value) { - return value; - } - - public static short ToInt16(byte value) { - return value; - } - - [CLSCompliant(false)] - public static short ToInt16(ushort value) { - if (value > Int16.MaxValue) ThrowInt16OverflowException(); - Contract.EndContractBlock(); - return (short)value; - } - - public static short ToInt16(int value) { - if (value < Int16.MinValue || value > Int16.MaxValue) ThrowInt16OverflowException(); - Contract.EndContractBlock(); - return (short)value; - } - - [CLSCompliant(false)] - public static short ToInt16(uint value) { - if (value > Int16.MaxValue) ThrowInt16OverflowException(); - Contract.EndContractBlock(); - return (short)value; - } - - public static short ToInt16(short value) { - return value; - } - - public static short ToInt16(long value) { - if (value < Int16.MinValue || value > Int16.MaxValue) ThrowInt16OverflowException(); - Contract.EndContractBlock(); - return (short)value; - } - - [CLSCompliant(false)] - public static short ToInt16(ulong value) { - if (value > (ulong)Int16.MaxValue) ThrowInt16OverflowException(); - Contract.EndContractBlock(); - return (short)value; - } - - public static short ToInt16(float value) { - return ToInt16((double)value); - } - - public static short ToInt16(double value) { - return ToInt16(ToInt32(value)); - } - - public static short ToInt16(decimal value) { - return Decimal.ToInt16(Decimal.Round(value, 0)); - } - - public static short ToInt16(String value) { - if (value == null) - return 0; - return Int16.Parse(value, CultureInfo.CurrentCulture); - } - - public static short ToInt16(String value, IFormatProvider provider) { - if (value == null) - return 0; - return Int16.Parse(value, NumberStyles.Integer, provider); - } - - public static short ToInt16(DateTime value) - { - return ((IConvertible)value).ToInt16(null); - } - - - // Disallowed conversions to Int16 - // public static short ToInt16(TimeSpan value) - - // Conversions to UInt16 - - [CLSCompliant(false)] - public static ushort ToUInt16(object value) { - return value == null? (ushort)0: ((IConvertible)value).ToUInt16(null); - } - - [CLSCompliant(false)] - public static ushort ToUInt16(object value, IFormatProvider provider) { - return value == null? (ushort)0: ((IConvertible)value).ToUInt16(provider); - } - - - [CLSCompliant(false)] - public static ushort ToUInt16(bool value) { - return value? (ushort)Boolean.True: (ushort)Boolean.False; - } - - [CLSCompliant(false)] - public static ushort ToUInt16(char value) { - return value; - } - - [CLSCompliant(false)] - public static ushort ToUInt16(sbyte value) { - if (value < 0) ThrowUInt16OverflowException(); - Contract.EndContractBlock(); - return (ushort)value; - } - - [CLSCompliant(false)] - public static ushort ToUInt16(byte value) { - return value; - } - - [CLSCompliant(false)] - public static ushort ToUInt16(short value) { - if (value < 0) ThrowUInt16OverflowException(); - Contract.EndContractBlock(); - return (ushort)value; - } - - [CLSCompliant(false)] - public static ushort ToUInt16(int value) { - if (value < 0 || value > UInt16.MaxValue) ThrowUInt16OverflowException(); - Contract.EndContractBlock(); - return (ushort)value; - } - - [CLSCompliant(false)] - public static ushort ToUInt16(ushort value) { - return value; - } - - [CLSCompliant(false)] - public static ushort ToUInt16(uint value) { - if (value > UInt16.MaxValue) ThrowUInt16OverflowException(); - Contract.EndContractBlock(); - return (ushort)value; - } - - - [CLSCompliant(false)] - public static ushort ToUInt16(long value) { - if (value < 0 || value > UInt16.MaxValue) ThrowUInt16OverflowException(); - Contract.EndContractBlock(); - return (ushort)value; - } - - [CLSCompliant(false)] - public static ushort ToUInt16(ulong value) { - if (value > UInt16.MaxValue) ThrowUInt16OverflowException(); - Contract.EndContractBlock(); - return (ushort)value; - } - - [CLSCompliant(false)] - public static ushort ToUInt16(float value) { - return ToUInt16((double)value); - } - - [CLSCompliant(false)] - public static ushort ToUInt16(double value) { - return ToUInt16(ToInt32(value)); - } - - [CLSCompliant(false)] - public static ushort ToUInt16(decimal value) { - return Decimal.ToUInt16(Decimal.Round(value, 0)); - } - - [CLSCompliant(false)] - public static ushort ToUInt16(String value) { - if (value == null) - return 0; - return UInt16.Parse(value, CultureInfo.CurrentCulture); - } - - [CLSCompliant(false)] - public static ushort ToUInt16(String value, IFormatProvider provider) { - if (value == null) - return 0; - return UInt16.Parse(value, NumberStyles.Integer, provider); - } - - [CLSCompliant(false)] - public static ushort ToUInt16(DateTime value) - { - return ((IConvertible)value).ToUInt16(null); - } - - // Disallowed conversions to UInt16 - // public static ushort ToUInt16(TimeSpan value) - - // Conversions to Int32 - - public static int ToInt32(object value) { - return value == null? 0: ((IConvertible)value).ToInt32(null); - } - - public static int ToInt32(object value, IFormatProvider provider) { - return value == null? 0: ((IConvertible)value).ToInt32(provider); - } - - - public static int ToInt32(bool value) { - return value? Boolean.True: Boolean.False; - } - - public static int ToInt32(char value) { - return value; - } - - [CLSCompliant(false)] - public static int ToInt32(sbyte value) { - return value; - } - - public static int ToInt32(byte value) { - return value; - } - - public static int ToInt32(short value) { - return value; - } - - [CLSCompliant(false)] - public static int ToInt32(ushort value) { - return value; - } - - [CLSCompliant(false)] - public static int ToInt32(uint value) { - if (value > Int32.MaxValue) ThrowInt32OverflowException(); - Contract.EndContractBlock(); - return (int)value; - } - - public static int ToInt32(int value) { - return value; - } - - public static int ToInt32(long value) { - if (value < Int32.MinValue || value > Int32.MaxValue) ThrowInt32OverflowException(); - Contract.EndContractBlock(); - return (int)value; - } - - [CLSCompliant(false)] - public static int ToInt32(ulong value) { - if (value > Int32.MaxValue) ThrowInt32OverflowException(); - Contract.EndContractBlock(); - return (int)value; - } - - public static int ToInt32(float value) { - return ToInt32((double)value); - } - - public static int ToInt32(double value) { - if (value >= 0) { - if (value < 2147483647.5) { - int result = (int)value; - double dif = value - result; - if (dif > 0.5 || dif == 0.5 && (result & 1) != 0) result++; - return result; - } - } - else { - if (value >= -2147483648.5) { - int result = (int)value; - double dif = value - result; - if (dif < -0.5 || dif == -0.5 && (result & 1) != 0) result--; - return result; - } - } - throw new OverflowException(Environment.GetResourceString("Overflow_Int32")); - } - - public static int ToInt32(decimal value) { - return Decimal.FCallToInt32(value); - } - - public static int ToInt32(String value) { - if (value == null) - return 0; - return Int32.Parse(value, CultureInfo.CurrentCulture); - } - - public static int ToInt32(String value, IFormatProvider provider) { - if (value == null) - return 0; - return Int32.Parse(value, NumberStyles.Integer, provider); - } - - public static int ToInt32(DateTime value) - { - return ((IConvertible)value).ToInt32(null); - } - - - // Disallowed conversions to Int32 - // public static int ToInt32(TimeSpan value) - - // Conversions to UInt32 - - [CLSCompliant(false)] - public static uint ToUInt32(object value) { - return value == null? 0: ((IConvertible)value).ToUInt32(null); - } - - [CLSCompliant(false)] - public static uint ToUInt32(object value, IFormatProvider provider) { - return value == null? 0: ((IConvertible)value).ToUInt32(provider); - } - - - [CLSCompliant(false)] - public static uint ToUInt32(bool value) { - return value? (uint)Boolean.True: (uint)Boolean.False; - } - - [CLSCompliant(false)] - public static uint ToUInt32(char value) { - return value; - } - - [CLSCompliant(false)] - public static uint ToUInt32(sbyte value) { - if (value < 0) ThrowUInt32OverflowException(); - Contract.EndContractBlock(); - return (uint)value; - } - - [CLSCompliant(false)] - public static uint ToUInt32(byte value) { - return value; - } - - [CLSCompliant(false)] - public static uint ToUInt32(short value) { - if (value < 0) ThrowUInt32OverflowException(); - Contract.EndContractBlock(); - return (uint)value; - } - - [CLSCompliant(false)] - public static uint ToUInt32(ushort value) { - return value; - } - - [CLSCompliant(false)] - public static uint ToUInt32(int value) { - if (value < 0) ThrowUInt32OverflowException(); - Contract.EndContractBlock(); - return (uint)value; - } - - [CLSCompliant(false)] - public static uint ToUInt32(uint value) { - return value; - } - - [CLSCompliant(false)] - public static uint ToUInt32(long value) { - if (value < 0 || value > UInt32.MaxValue) ThrowUInt32OverflowException(); - Contract.EndContractBlock(); - return (uint)value; - } - - [CLSCompliant(false)] - public static uint ToUInt32(ulong value) { - if (value > UInt32.MaxValue) ThrowUInt32OverflowException(); - Contract.EndContractBlock(); - return (uint)value; - } - - [CLSCompliant(false)] - public static uint ToUInt32(float value) { - return ToUInt32((double)value); - } - - [CLSCompliant(false)] - public static uint ToUInt32(double value) { - if (value >= -0.5 && value < 4294967295.5) { - uint result = (uint)value; - double dif = value - result; - if (dif > 0.5 || dif == 0.5 && (result & 1) != 0) result++; - return result; - } - throw new OverflowException(Environment.GetResourceString("Overflow_UInt32")); - } - - [CLSCompliant(false)] - public static uint ToUInt32(decimal value) { - return Decimal.ToUInt32(Decimal.Round(value, 0)); - } - - [CLSCompliant(false)] - public static uint ToUInt32(String value) { - if (value == null) - return 0; - return UInt32.Parse(value, CultureInfo.CurrentCulture); - } - - [CLSCompliant(false)] - public static uint ToUInt32(String value, IFormatProvider provider) { - if (value == null) - return 0; - return UInt32.Parse(value, NumberStyles.Integer, provider); - } - - [CLSCompliant(false)] - public static uint ToUInt32(DateTime value) - { - return ((IConvertible)value).ToUInt32(null); - } - - // Disallowed conversions to UInt32 - // public static uint ToUInt32(TimeSpan value) - - // Conversions to Int64 - - public static long ToInt64(object value) { - return value == null? 0: ((IConvertible)value).ToInt64(null); - } - - public static long ToInt64(object value, IFormatProvider provider) { - return value == null? 0: ((IConvertible)value).ToInt64(provider); - } - - - public static long ToInt64(bool value) { - return value? Boolean.True: Boolean.False; - } - - public static long ToInt64(char value) { - return value; - } - - [CLSCompliant(false)] - public static long ToInt64(sbyte value) { - return value; - } - - public static long ToInt64(byte value) { - return value; - } - - public static long ToInt64(short value) { - return value; - } - - [CLSCompliant(false)] - public static long ToInt64(ushort value) { - return value; - } - - public static long ToInt64(int value) { - return value; - } - - [CLSCompliant(false)] - public static long ToInt64(uint value) { - return value; - } - - [CLSCompliant(false)] - public static long ToInt64(ulong value) { - if (value > Int64.MaxValue) ThrowInt64OverflowException(); - Contract.EndContractBlock(); - return (long)value; - } - - public static long ToInt64(long value) { - return value; - } - - - public static long ToInt64(float value) { - return ToInt64((double)value); - } - - public static long ToInt64(double value) { - return checked((long)Math.Round(value)); - } - - public static long ToInt64(decimal value) { - return Decimal.ToInt64(Decimal.Round(value, 0)); - } - - public static long ToInt64(string value) { - if (value == null) - return 0; - return Int64.Parse(value, CultureInfo.CurrentCulture); - } - - public static long ToInt64(String value, IFormatProvider provider) { - if (value == null) - return 0; - return Int64.Parse(value, NumberStyles.Integer, provider); - } - - public static long ToInt64(DateTime value) - { - return ((IConvertible)value).ToInt64(null); - } - - // Disallowed conversions to Int64 - // public static long ToInt64(TimeSpan value) - - // Conversions to UInt64 - - [CLSCompliant(false)] - public static ulong ToUInt64(object value) { - return value == null? 0: ((IConvertible)value).ToUInt64(null); - } - - [CLSCompliant(false)] - public static ulong ToUInt64(object value, IFormatProvider provider) { - return value == null? 0: ((IConvertible)value).ToUInt64(provider); - } - - [CLSCompliant(false)] - public static ulong ToUInt64(bool value) { - return value? (ulong)Boolean.True: (ulong)Boolean.False; - } - - [CLSCompliant(false)] - public static ulong ToUInt64(char value) { - return value; - } - - - [CLSCompliant(false)] - public static ulong ToUInt64(sbyte value) { - if (value < 0) ThrowUInt64OverflowException(); - Contract.EndContractBlock(); - return (ulong)value; - } - - [CLSCompliant(false)] - public static ulong ToUInt64(byte value) { - return value; - } - - [CLSCompliant(false)] - public static ulong ToUInt64(short value) { - if (value < 0) ThrowUInt64OverflowException(); - Contract.EndContractBlock(); - return (ulong)value; - } - - [CLSCompliant(false)] - public static ulong ToUInt64(ushort value) { - return value; - } - - [CLSCompliant(false)] - public static ulong ToUInt64(int value) { - if (value < 0) ThrowUInt64OverflowException(); - Contract.EndContractBlock(); - return (ulong)value; - } - - [CLSCompliant(false)] - public static ulong ToUInt64(uint value) { - return value; - } - - [CLSCompliant(false)] - public static ulong ToUInt64(long value) { - if (value < 0) ThrowUInt64OverflowException(); - Contract.EndContractBlock(); - return (ulong)value; - } - - [CLSCompliant(false)] - public static ulong ToUInt64(UInt64 value) { - return value; - } - - [CLSCompliant(false)] - public static ulong ToUInt64(float value) { - return ToUInt64((double)value); - } - - [CLSCompliant(false)] - public static ulong ToUInt64(double value) { - return checked((ulong)Math.Round(value)); - } - - [CLSCompliant(false)] - public static ulong ToUInt64(decimal value) { - return Decimal.ToUInt64(Decimal.Round(value, 0)); - } - - [CLSCompliant(false)] - public static ulong ToUInt64(String value) { - if (value == null) - return 0; - return UInt64.Parse(value, CultureInfo.CurrentCulture); - } - - [CLSCompliant(false)] - public static ulong ToUInt64(String value, IFormatProvider provider) { - if (value == null) - return 0; - return UInt64.Parse(value, NumberStyles.Integer, provider); - } - - [CLSCompliant(false)] - public static ulong ToUInt64(DateTime value) - { - return ((IConvertible)value).ToUInt64(null); - } - - // Disallowed conversions to UInt64 - // public static ulong ToUInt64(TimeSpan value) - - // Conversions to Single - - public static float ToSingle(object value) { - return value == null? 0: ((IConvertible)value).ToSingle(null); - } - - public static float ToSingle(object value, IFormatProvider provider) { - return value == null? 0: ((IConvertible)value).ToSingle(provider); - } - - [CLSCompliant(false)] - public static float ToSingle(sbyte value) { - return value; - } - - public static float ToSingle(byte value) { - return value; - } - - public static float ToSingle(char value) { - return ((IConvertible)value).ToSingle(null); - } - - public static float ToSingle(short value) { - return value; - } - - [CLSCompliant(false)] - public static float ToSingle(ushort value) { - return value; - } - - public static float ToSingle(int value) { - return value; - } - - [CLSCompliant(false)] - public static float ToSingle(uint value) { - return value; - } - - public static float ToSingle(long value) { - return value; - } - - [CLSCompliant(false)] - public static float ToSingle(ulong value) { - return value; - } - - public static float ToSingle(float value) { - return value; - } - - public static float ToSingle(double value) { - return (float)value; - } - - public static float ToSingle(decimal value) { - return (float)value; - } - - public static float ToSingle(String value) { - if (value == null) - return 0; - return Single.Parse(value, CultureInfo.CurrentCulture); - } - - public static float ToSingle(String value, IFormatProvider provider) { - if (value == null) - return 0; - return Single.Parse(value, NumberStyles.Float | NumberStyles.AllowThousands, provider); - } - - - public static float ToSingle(bool value) - { - return value? Boolean.True: Boolean.False; - } - - public static float ToSingle(DateTime value) - { - return ((IConvertible)value).ToSingle(null); - } - - // Disallowed conversions to Single - // public static float ToSingle(TimeSpan value) - - // Conversions to Double - - public static double ToDouble(object value) { - return value == null? 0: ((IConvertible)value).ToDouble(null); - } - - public static double ToDouble(object value, IFormatProvider provider) { - return value == null? 0: ((IConvertible)value).ToDouble(provider); - } - - - [CLSCompliant(false)] - public static double ToDouble(sbyte value) { - return value; - } - - public static double ToDouble(byte value) { - return value; - } - - public static double ToDouble(short value) { - return value; - } - - public static double ToDouble(char value) { - return ((IConvertible)value).ToDouble(null); - } - - [CLSCompliant(false)] - public static double ToDouble(ushort value) { - return value; - } - - public static double ToDouble(int value) { - return value; - } - - [CLSCompliant(false)] - public static double ToDouble(uint value) { - return value; - } - - public static double ToDouble(long value) { - return value; - } - - [CLSCompliant(false)] - public static double ToDouble(ulong value) { - return value; - } - - public static double ToDouble(float value) { - return value; - } - - public static double ToDouble(double value) { - return value; - } - - public static double ToDouble(decimal value) { - return (double)value; - } - - public static double ToDouble(String value) { - if (value == null) - return 0; - return Double.Parse(value, CultureInfo.CurrentCulture); - } - - public static double ToDouble(String value, IFormatProvider provider) { - if (value == null) - return 0; - return Double.Parse(value, NumberStyles.Float | NumberStyles.AllowThousands, provider); - } - - public static double ToDouble(bool value) { - return value? Boolean.True: Boolean.False; - } - - public static double ToDouble(DateTime value) - { - return ((IConvertible)value).ToDouble(null); - } - - // Disallowed conversions to Double - // public static double ToDouble(TimeSpan value) - - // Conversions to Decimal - - public static decimal ToDecimal(object value) { - return value == null? 0: ((IConvertible)value).ToDecimal(null); - } - - public static decimal ToDecimal(object value, IFormatProvider provider) { - return value == null? 0: ((IConvertible)value).ToDecimal(provider); - } - - [CLSCompliant(false)] - public static decimal ToDecimal(sbyte value) { - return value; - } - - public static decimal ToDecimal(byte value) { - return value; - } - - public static decimal ToDecimal(char value) { - return ((IConvertible)value).ToDecimal(null); - } - - public static decimal ToDecimal(short value) { - return value; - } - - [CLSCompliant(false)] - public static decimal ToDecimal(ushort value) { - return value; - } - - public static decimal ToDecimal(int value) { - return value; - } - - [CLSCompliant(false)] - public static decimal ToDecimal(uint value) { - return value; - } - - public static decimal ToDecimal(long value) { - return value; - } - - [CLSCompliant(false)] - public static decimal ToDecimal(ulong value) { - return value; - } - - public static decimal ToDecimal(float value) { - return (decimal)value; - } - - public static decimal ToDecimal(double value) { - return (decimal)value; - } - - public static decimal ToDecimal(String value) { - if (value == null) - return 0m; - return Decimal.Parse(value, CultureInfo.CurrentCulture); - } - - public static Decimal ToDecimal(String value, IFormatProvider provider) { - if (value == null) - return 0m; - return Decimal.Parse(value, NumberStyles.Number, provider); - } - - public static decimal ToDecimal(decimal value) { - return value; - } - - public static decimal ToDecimal(bool value) { - return value? Boolean.True: Boolean.False; - } - - public static decimal ToDecimal(DateTime value) - { - return ((IConvertible)value).ToDecimal(null); - } - - // Disallowed conversions to Decimal - // public static decimal ToDecimal(TimeSpan value) - - // Conversions to DateTime - - public static DateTime ToDateTime(DateTime value) { - return value; - } - - public static DateTime ToDateTime(object value) { - return value == null? DateTime.MinValue: ((IConvertible)value).ToDateTime(null); - } - - public static DateTime ToDateTime(object value, IFormatProvider provider) { - return value == null? DateTime.MinValue: ((IConvertible)value).ToDateTime(provider); - } - - public static DateTime ToDateTime(String value) { - if (value == null) - return new DateTime(0); - return DateTime.Parse(value, CultureInfo.CurrentCulture); - } - - public static DateTime ToDateTime(String value, IFormatProvider provider) { - if (value == null) - return new DateTime(0); - return DateTime.Parse(value, provider); - } - - [CLSCompliant(false)] - public static DateTime ToDateTime(sbyte value) { - return ((IConvertible)value).ToDateTime(null); - } - - public static DateTime ToDateTime(byte value) { - return ((IConvertible)value).ToDateTime(null); - } - - public static DateTime ToDateTime(short value) { - return ((IConvertible)value).ToDateTime(null); - } - - [CLSCompliant(false)] - public static DateTime ToDateTime(ushort value) { - return ((IConvertible)value).ToDateTime(null); - } - - public static DateTime ToDateTime(int value) { - return ((IConvertible)value).ToDateTime(null); - } - - [CLSCompliant(false)] - public static DateTime ToDateTime(uint value) { - return ((IConvertible)value).ToDateTime(null); - } - - public static DateTime ToDateTime(long value) { - return ((IConvertible)value).ToDateTime(null); - } - - [CLSCompliant(false)] - public static DateTime ToDateTime(ulong value) { - return ((IConvertible)value).ToDateTime(null); - } - - public static DateTime ToDateTime(bool value) { - return ((IConvertible)value).ToDateTime(null); - } - - public static DateTime ToDateTime(char value) { - return ((IConvertible)value).ToDateTime(null); - } - - public static DateTime ToDateTime(float value) { - return ((IConvertible)value).ToDateTime(null); - } - - public static DateTime ToDateTime(double value) { - return ((IConvertible)value).ToDateTime(null); - } - - public static DateTime ToDateTime(decimal value) { - return ((IConvertible)value).ToDateTime(null); - } - - // Disallowed conversions to DateTime - // public static DateTime ToDateTime(TimeSpan value) - - // Conversions to String - - public static string ToString(Object value) { - return ToString(value,null); - } - - public static string ToString(Object value, IFormatProvider provider) { - IConvertible ic = value as IConvertible; - if (ic != null) - return ic.ToString(provider); - IFormattable formattable = value as IFormattable; - if (formattable != null) - return formattable.ToString(null, provider); - return value == null? String.Empty: value.ToString(); - } - - public static string ToString(bool value) { - Contract.Ensures(Contract.Result<string>() != null); - return value.ToString(); - } - - public static string ToString(bool value, IFormatProvider provider) { - Contract.Ensures(Contract.Result<string>() != null); - return value.ToString(provider); - } - - public static string ToString(char value) { - Contract.Ensures(Contract.Result<string>() != null); - return Char.ToString(value); - } - - public static string ToString(char value, IFormatProvider provider) { - Contract.Ensures(Contract.Result<string>() != null); - return value.ToString(provider); - } - - [CLSCompliant(false)] - public static string ToString(sbyte value) { - Contract.Ensures(Contract.Result<string>() != null); - return value.ToString(CultureInfo.CurrentCulture); - } - - [CLSCompliant(false)] - public static string ToString(sbyte value, IFormatProvider provider) { - Contract.Ensures(Contract.Result<string>() != null); - return value.ToString(provider); - } - - public static string ToString(byte value) { - Contract.Ensures(Contract.Result<string>() != null); - return value.ToString(CultureInfo.CurrentCulture); - } - - public static string ToString(byte value, IFormatProvider provider) { - Contract.Ensures(Contract.Result<string>() != null); - return value.ToString(provider); - } - - public static string ToString(short value) { - Contract.Ensures(Contract.Result<string>() != null); - return value.ToString(CultureInfo.CurrentCulture); - } - - public static string ToString(short value, IFormatProvider provider) { - Contract.Ensures(Contract.Result<string>() != null); - return value.ToString(provider); - } - - [CLSCompliant(false)] - public static string ToString(ushort value) { - Contract.Ensures(Contract.Result<string>() != null); - return value.ToString(CultureInfo.CurrentCulture); - } - - [CLSCompliant(false)] - public static string ToString(ushort value, IFormatProvider provider) { - Contract.Ensures(Contract.Result<string>() != null); - return value.ToString(provider); - } - - public static string ToString(int value) { - Contract.Ensures(Contract.Result<string>() != null); - return value.ToString(CultureInfo.CurrentCulture); - } - - public static string ToString(int value, IFormatProvider provider) { - Contract.Ensures(Contract.Result<string>() != null); - return value.ToString(provider); - } - - [CLSCompliant(false)] - public static string ToString(uint value) { - Contract.Ensures(Contract.Result<string>() != null); - return value.ToString(CultureInfo.CurrentCulture); - } - - [CLSCompliant(false)] - public static string ToString(uint value, IFormatProvider provider) { - Contract.Ensures(Contract.Result<string>() != null); - return value.ToString(provider); - } - - public static string ToString(long value) { - Contract.Ensures(Contract.Result<string>() != null); - return value.ToString(CultureInfo.CurrentCulture); - } - - public static string ToString(long value, IFormatProvider provider) { - Contract.Ensures(Contract.Result<string>() != null); - return value.ToString(provider); - } - - [CLSCompliant(false)] - public static string ToString(ulong value) { - Contract.Ensures(Contract.Result<string>() != null); - return value.ToString(CultureInfo.CurrentCulture); - } - - [CLSCompliant(false)] - public static string ToString(ulong value, IFormatProvider provider) { - Contract.Ensures(Contract.Result<string>() != null); - return value.ToString(provider); - } - - public static string ToString(float value) { - Contract.Ensures(Contract.Result<string>() != null); - return value.ToString(CultureInfo.CurrentCulture); - } - - public static string ToString(float value, IFormatProvider provider) { - Contract.Ensures(Contract.Result<string>() != null); - return value.ToString(provider); - } - - public static string ToString(double value) { - Contract.Ensures(Contract.Result<string>() != null); - return value.ToString(CultureInfo.CurrentCulture); - } - - public static string ToString(double value, IFormatProvider provider) { - Contract.Ensures(Contract.Result<string>() != null); - return value.ToString(provider); - } - - public static string ToString(decimal value) { - Contract.Ensures(Contract.Result<string>() != null); - return value.ToString(CultureInfo.CurrentCulture); - } - - public static string ToString(Decimal value, IFormatProvider provider) { - Contract.Ensures(Contract.Result<string>() != null); - return value.ToString(provider); - } - - public static string ToString(DateTime value) { - Contract.Ensures(Contract.Result<string>() != null); - return value.ToString(); - } - - public static string ToString(DateTime value, IFormatProvider provider) { - Contract.Ensures(Contract.Result<string>() != null); - return value.ToString(provider); - } - - public static String ToString(String value) { - Contract.Ensures(Contract.Result<string>() == value); // We were always skipping the null check here. - return value; - } - - public static String ToString(String value,IFormatProvider provider) { - Contract.Ensures(Contract.Result<string>() == value); // We were always skipping the null check here. - return value; // avoid the null check - } - - - // - // Conversions which understand Base XXX numbers. - // - // Parses value in base base. base can only - // be 2, 8, 10, or 16. If base is 16, the number may be preceded - // by 0x; any other leading or trailing characters cause an error. - // - public static byte ToByte (String value, int fromBase) { - if (fromBase!=2 && fromBase!=8 && fromBase!=10 && fromBase!=16) { - throw new ArgumentException(Environment.GetResourceString("Arg_InvalidBase")); - } - Contract.EndContractBlock(); - int r = ParseNumbers.StringToInt(value,fromBase,ParseNumbers.IsTight | ParseNumbers.TreatAsUnsigned); - if (r < Byte.MinValue || r > Byte.MaxValue) - ThrowByteOverflowException(); - return (byte) r; - } - - // Parses value in base fromBase. fromBase can only - // be 2, 8, 10, or 16. If fromBase is 16, the number may be preceded - // by 0x; any other leading or trailing characters cause an error. - // - [CLSCompliant(false)] - public static sbyte ToSByte (String value, int fromBase) { - if (fromBase!=2 && fromBase!=8 && fromBase!=10 && fromBase!=16) { - throw new ArgumentException(Environment.GetResourceString("Arg_InvalidBase")); - } - Contract.EndContractBlock(); - int r = ParseNumbers.StringToInt(value,fromBase,ParseNumbers.IsTight | ParseNumbers.TreatAsI1); - if (fromBase != 10 && r <= Byte.MaxValue) - return (sbyte)r; - - if (r < SByte.MinValue || r > SByte.MaxValue) - ThrowSByteOverflowException(); - return (sbyte) r; - } - - // Parses value in base fromBase. fromBase can only - // be 2, 8, 10, or 16. If fromBase is 16, the number may be preceded - // by 0x; any other leading or trailing characters cause an error. - // - public static short ToInt16 (String value, int fromBase) { - if (fromBase!=2 && fromBase!=8 && fromBase!=10 && fromBase!=16) { - throw new ArgumentException(Environment.GetResourceString("Arg_InvalidBase")); - } - Contract.EndContractBlock(); - int r = ParseNumbers.StringToInt(value,fromBase,ParseNumbers.IsTight | ParseNumbers.TreatAsI2); - if (fromBase != 10 && r <= UInt16.MaxValue) - return (short)r; - - if (r < Int16.MinValue || r > Int16.MaxValue) - ThrowInt16OverflowException(); - return (short) r; - } - - // Parses value in base fromBase. fromBase can only - // be 2, 8, 10, or 16. If fromBase is 16, the number may be preceded - // by 0x; any other leading or trailing characters cause an error. - // - [CLSCompliant(false)] - public static ushort ToUInt16 (String value, int fromBase) { - if (fromBase!=2 && fromBase!=8 && fromBase!=10 && fromBase!=16) { - throw new ArgumentException(Environment.GetResourceString("Arg_InvalidBase")); - } - Contract.EndContractBlock(); - int r = ParseNumbers.StringToInt(value,fromBase,ParseNumbers.IsTight | ParseNumbers.TreatAsUnsigned); - if (r < UInt16.MinValue || r > UInt16.MaxValue) - ThrowUInt16OverflowException(); - return (ushort) r; - } - - // Parses value in base fromBase. fromBase can only - // be 2, 8, 10, or 16. If fromBase is 16, the number may be preceded - // by 0x; any other leading or trailing characters cause an error. - // - public static int ToInt32 (String value, int fromBase) { - if (fromBase!=2 && fromBase!=8 && fromBase!=10 && fromBase!=16) { - throw new ArgumentException(Environment.GetResourceString("Arg_InvalidBase")); - } - Contract.EndContractBlock(); - return ParseNumbers.StringToInt(value,fromBase,ParseNumbers.IsTight); - } - - // Parses value in base fromBase. fromBase can only - // be 2, 8, 10, or 16. If fromBase is 16, the number may be preceded - // by 0x; any other leading or trailing characters cause an error. - // - [CLSCompliant(false)] - public static uint ToUInt32 (String value, int fromBase) { - if (fromBase!=2 && fromBase!=8 && fromBase!=10 && fromBase!=16) { - throw new ArgumentException(Environment.GetResourceString("Arg_InvalidBase")); - } - Contract.EndContractBlock(); - return (uint) ParseNumbers.StringToInt(value,fromBase, ParseNumbers.TreatAsUnsigned | ParseNumbers.IsTight); - } - - // Parses value in base fromBase. fromBase can only - // be 2, 8, 10, or 16. If fromBase is 16, the number may be preceded - // by 0x; any other leading or trailing characters cause an error. - // - public static long ToInt64 (String value, int fromBase) { - if (fromBase!=2 && fromBase!=8 && fromBase!=10 && fromBase!=16) { - throw new ArgumentException(Environment.GetResourceString("Arg_InvalidBase")); - } - Contract.EndContractBlock(); - return ParseNumbers.StringToLong(value,fromBase,ParseNumbers.IsTight); - } - - // Parses value in base fromBase. fromBase can only - // be 2, 8, 10, or 16. If fromBase is 16, the number may be preceded - // by 0x; any other leading or trailing characters cause an error. - // - [CLSCompliant(false)] - public static ulong ToUInt64 (String value, int fromBase) { - if (fromBase!=2 && fromBase!=8 && fromBase!=10 && fromBase!=16) { - throw new ArgumentException(Environment.GetResourceString("Arg_InvalidBase")); - } - Contract.EndContractBlock(); - return (ulong) ParseNumbers.StringToLong(value,fromBase, ParseNumbers.TreatAsUnsigned | ParseNumbers.IsTight); - } - - // Convert the byte value to a string in base fromBase - public static String ToString (byte value, int toBase) { - if (toBase!=2 && toBase!=8 && toBase!=10 && toBase!=16) { - throw new ArgumentException(Environment.GetResourceString("Arg_InvalidBase")); - } - Contract.EndContractBlock(); - return ParseNumbers.IntToString((int)value, toBase, -1, ' ', ParseNumbers.PrintAsI1); - } - - // Convert the Int16 value to a string in base fromBase - public static String ToString (short value, int toBase) { - if (toBase!=2 && toBase!=8 && toBase!=10 && toBase!=16) { - throw new ArgumentException(Environment.GetResourceString("Arg_InvalidBase")); - } - Contract.EndContractBlock(); - return ParseNumbers.IntToString((int)value, toBase, -1, ' ', ParseNumbers.PrintAsI2); - } - - // Convert the Int32 value to a string in base toBase - public static String ToString (int value, int toBase) { - if (toBase!=2 && toBase!=8 && toBase!=10 && toBase!=16) { - throw new ArgumentException(Environment.GetResourceString("Arg_InvalidBase")); - } - Contract.EndContractBlock(); - return ParseNumbers.IntToString(value, toBase, -1, ' ', 0); - } - - // Convert the Int64 value to a string in base toBase - public static String ToString (long value, int toBase) { - if (toBase!=2 && toBase!=8 && toBase!=10 && toBase!=16) { - throw new ArgumentException(Environment.GetResourceString("Arg_InvalidBase")); - } - Contract.EndContractBlock(); - return ParseNumbers.LongToString(value, toBase, -1, ' ', 0); - } - - public static String ToBase64String(byte[] inArray) { - if (inArray==null) { - throw new ArgumentNullException(nameof(inArray)); - } - Contract.Ensures(Contract.Result<string>() != null); - Contract.EndContractBlock(); - return ToBase64String(inArray, 0, inArray.Length, Base64FormattingOptions.None); - } - - public static String ToBase64String(byte[] inArray, Base64FormattingOptions options) { - if (inArray==null) { - throw new ArgumentNullException(nameof(inArray)); - } - Contract.Ensures(Contract.Result<string>() != null); - Contract.EndContractBlock(); - return ToBase64String(inArray, 0, inArray.Length, options); - } - - public static String ToBase64String(byte[] inArray, int offset, int length) { - return ToBase64String(inArray, offset, length, Base64FormattingOptions.None); - } - - public static unsafe String ToBase64String(byte[] inArray, int offset, int length, Base64FormattingOptions options) { - //Do data verfication - if (inArray==null) - throw new ArgumentNullException(nameof(inArray)); - if (length<0) - throw new ArgumentOutOfRangeException(nameof(length), Environment.GetResourceString("ArgumentOutOfRange_Index")); - if (offset<0) - throw new ArgumentOutOfRangeException(nameof(offset), Environment.GetResourceString("ArgumentOutOfRange_GenericPositive")); - if (options < Base64FormattingOptions.None || options > Base64FormattingOptions.InsertLineBreaks) - throw new ArgumentException(Environment.GetResourceString("Arg_EnumIllegalVal", (int)options)); - Contract.Ensures(Contract.Result<string>() != null); - Contract.EndContractBlock(); - - int inArrayLength; - int stringLength; - - inArrayLength = inArray.Length; - if (offset > (inArrayLength - length)) - throw new ArgumentOutOfRangeException(nameof(offset), Environment.GetResourceString("ArgumentOutOfRange_OffsetLength")); - - if (inArrayLength == 0) - return String.Empty; - - bool insertLineBreaks = (options == Base64FormattingOptions.InsertLineBreaks); - //Create the new string. This is the maximally required length. - stringLength = ToBase64_CalculateAndValidateOutputLength(length, insertLineBreaks); - - string returnString = string.FastAllocateString(stringLength); - fixed (char* outChars = returnString){ - fixed (byte* inData = &inArray[0]) { - int j = ConvertToBase64Array(outChars,inData,offset,length, insertLineBreaks); - BCLDebug.Assert(returnString.Length == j, "returnString.Length == j"); - return returnString; - } - } - } - - public static int ToBase64CharArray(byte[] inArray, int offsetIn, int length, char[] outArray, int offsetOut) { - Contract.Ensures(Contract.Result<int>() >= 0); - Contract.Ensures(Contract.Result<int>() <= outArray.Length); - Contract.EndContractBlock(); - - return ToBase64CharArray(inArray, offsetIn, length, outArray, offsetOut, Base64FormattingOptions.None); - } - - public static unsafe int ToBase64CharArray(byte[] inArray, int offsetIn, int length, char[] outArray, int offsetOut, Base64FormattingOptions options) { - //Do data verfication - if (inArray==null) - throw new ArgumentNullException(nameof(inArray)); - if (outArray==null) - throw new ArgumentNullException(nameof(outArray)); - if (length<0) - throw new ArgumentOutOfRangeException(nameof(length), Environment.GetResourceString("ArgumentOutOfRange_Index")); - if (offsetIn<0) - throw new ArgumentOutOfRangeException(nameof(offsetIn), Environment.GetResourceString("ArgumentOutOfRange_GenericPositive")); - if (offsetOut<0) - throw new ArgumentOutOfRangeException(nameof(offsetOut), Environment.GetResourceString("ArgumentOutOfRange_GenericPositive")); - - if( options < Base64FormattingOptions.None || options > Base64FormattingOptions.InsertLineBreaks) { - throw new ArgumentException(Environment.GetResourceString("Arg_EnumIllegalVal", (int)options)); - } - Contract.Ensures(Contract.Result<int>() >= 0); - Contract.Ensures(Contract.Result<int>() <= outArray.Length); - Contract.EndContractBlock(); - - - int retVal; - - int inArrayLength; - int outArrayLength; - int numElementsToCopy; - - inArrayLength = inArray.Length; - - if (offsetIn > (int)(inArrayLength - length)) - throw new ArgumentOutOfRangeException(nameof(offsetIn), Environment.GetResourceString("ArgumentOutOfRange_OffsetLength")); - - if (inArrayLength == 0) - return 0; - - bool insertLineBreaks = (options == Base64FormattingOptions.InsertLineBreaks); - //This is the maximally required length that must be available in the char array - outArrayLength = outArray.Length; - - // Length of the char buffer required - numElementsToCopy = ToBase64_CalculateAndValidateOutputLength(length, insertLineBreaks); - - if (offsetOut > (int)(outArrayLength - numElementsToCopy)) - throw new ArgumentOutOfRangeException(nameof(offsetOut), Environment.GetResourceString("ArgumentOutOfRange_OffsetOut")); - - fixed (char* outChars = &outArray[offsetOut]) { - fixed (byte* inData = &inArray[0]) { - retVal = ConvertToBase64Array(outChars,inData,offsetIn,length, insertLineBreaks); - } - } - - return retVal; - } - - private static unsafe int ConvertToBase64Array(char* outChars, byte* inData, int offset, int length, bool insertLineBreaks) { - int lengthmod3 = length%3; - int calcLength = offset + (length - lengthmod3); - int j=0; - int charcount = 0; - //Convert three bytes at a time to base64 notation. This will consume 4 chars. - int i; - - // get a pointer to the base64Table to avoid unnecessary range checking - fixed(char* base64 = &base64Table[0]) { - for (i=offset; i<calcLength; i+=3) - { - if (insertLineBreaks) { - if (charcount == base64LineBreakPosition) { - outChars[j++] = '\r'; - outChars[j++] = '\n'; - charcount = 0; - } - charcount += 4; - } - outChars[j] = base64[(inData[i]&0xfc)>>2]; - outChars[j+1] = base64[((inData[i]&0x03)<<4) | ((inData[i+1]&0xf0)>>4)]; - outChars[j+2] = base64[((inData[i+1]&0x0f)<<2) | ((inData[i+2]&0xc0)>>6)]; - outChars[j+3] = base64[(inData[i+2]&0x3f)]; - j += 4; - } - - //Where we left off before - i = calcLength; - - if (insertLineBreaks && (lengthmod3 !=0) && (charcount == base64LineBreakPosition)) { - outChars[j++] = '\r'; - outChars[j++] = '\n'; - } - - switch(lengthmod3) - { - case 2: //One character padding needed - outChars[j] = base64[(inData[i]&0xfc)>>2]; - outChars[j+1] = base64[((inData[i]&0x03)<<4)|((inData[i+1]&0xf0)>>4)]; - outChars[j+2] = base64[(inData[i+1]&0x0f)<<2]; - outChars[j+3] = base64[64]; //Pad - j+=4; - break; - case 1: // Two character padding needed - outChars[j] = base64[(inData[i]&0xfc)>>2]; - outChars[j+1] = base64[(inData[i]&0x03)<<4]; - outChars[j+2] = base64[64]; //Pad - outChars[j+3] = base64[64]; //Pad - j+=4; - break; - } - } - - return j; - } - - private static int ToBase64_CalculateAndValidateOutputLength(int inputLength, bool insertLineBreaks) { - long outlen = ((long)inputLength) / 3 * 4; // the base length - we want integer division here. - outlen += ((inputLength % 3) != 0) ? 4 : 0; // at most 4 more chars for the remainder - - if (outlen == 0) - return 0; - - if (insertLineBreaks) { - long newLines = outlen / base64LineBreakPosition; - if ((outlen % base64LineBreakPosition) == 0) { - --newLines; - } - outlen += newLines * 2; // the number of line break chars we'll add, "\r\n" - } - - // If we overflow an int then we cannot allocate enough - // memory to output the value so throw - if (outlen > int.MaxValue) - throw new OutOfMemoryException(); - - return (int)outlen; - } - - - /// <summary> - /// Converts the specified string, which encodes binary data as Base64 digits, to the equivalent byte array. - /// </summary> - /// <param name="s">The string to convert</param> - /// <returns>The array of bytes represented by the specifed Base64 string.</returns> - public static Byte[] FromBase64String(String s) { - - // "s" is an unfortunate parameter name, but we need to keep it for backward compat. - - if (s == null) - throw new ArgumentNullException(nameof(s)); - - Contract.EndContractBlock(); - - unsafe { - fixed (Char* sPtr = s) { - - return FromBase64CharPtr(sPtr, s.Length); - } - } - } - - - /// <summary> - /// Converts the specified range of a Char array, which encodes binary data as Base64 digits, to the equivalent byte array. - /// </summary> - /// <param name="inArray">Chars representing Base64 encoding characters</param> - /// <param name="offset">A position within the input array.</param> - /// <param name="length">Number of element to convert.</param> - /// <returns>The array of bytes represented by the specified Base64 encoding characters.</returns> - public static Byte[] FromBase64CharArray(Char[] inArray, Int32 offset, Int32 length) { - - if (inArray == null) - throw new ArgumentNullException(nameof(inArray)); - - if (length < 0) - throw new ArgumentOutOfRangeException(nameof(length), Environment.GetResourceString("ArgumentOutOfRange_Index")); - - if (offset < 0) - throw new ArgumentOutOfRangeException(nameof(offset), Environment.GetResourceString("ArgumentOutOfRange_GenericPositive")); - - if (offset > inArray.Length - length) - throw new ArgumentOutOfRangeException(nameof(offset), Environment.GetResourceString("ArgumentOutOfRange_OffsetLength")); - - Contract.EndContractBlock(); - - unsafe { - fixed (Char* inArrayPtr = inArray) { - - return FromBase64CharPtr(inArrayPtr + offset, length); - } - } - } - - - - /// <summary> - /// Convert Base64 encoding characters to bytes: - /// - Compute result length exactly by actually walking the input; - /// - Allocate new result array based on computation; - /// - Decode input into the new array; - /// </summary> - /// <param name="inputPtr">Pointer to the first input char</param> - /// <param name="inputLength">Number of input chars</param> - /// <returns></returns> - private static unsafe Byte[] FromBase64CharPtr(Char* inputPtr, Int32 inputLength) { - - // The validity of parameters much be checked by callers, thus we are Critical here. - - Debug.Assert(0 <= inputLength); - - // We need to get rid of any trailing white spaces. - // Otherwise we would be rejecting input such as "abc= ": - while (inputLength > 0) - { - Int32 lastChar = inputPtr[inputLength - 1]; - if (lastChar != (Int32) ' ' && lastChar != (Int32) '\n' && lastChar != (Int32) '\r' && lastChar != (Int32) '\t') - break; - inputLength--; - } - - // Compute the output length: - Int32 resultLength = FromBase64_ComputeResultLength(inputPtr, inputLength); - - Debug.Assert(0 <= resultLength); - - // resultLength can be zero. We will still enter FromBase64_Decode and process the input. - // It may either simply write no bytes (e.g. input = " ") or throw (e.g. input = "ab"). - - // Create result byte blob: - Byte[] decodedBytes = new Byte[resultLength]; - - // Convert Base64 chars into bytes: - Int32 actualResultLength; - fixed (Byte* decodedBytesPtr = decodedBytes) - actualResultLength = FromBase64_Decode(inputPtr, inputLength, decodedBytesPtr, resultLength); - - // Note that actualResultLength can differ from resultLength if the caller is modifying the array - // as it is being converted. Silently ignore the failure. - // Consider throwing exception in an non in-place release. - - // We are done: - return decodedBytes; - } - - - /// <summary> - /// Decode characters representing a Base64 encoding into bytes: - /// Walk the input. Every time 4 chars are read, convert them to the 3 corresponding output bytes. - /// This method is a bit lengthy on purpose. We are trying to avoid jumps to helpers in the loop - /// to aid performance. - /// </summary> - /// <param name="inputPtr">Pointer to first input char</param> - /// <param name="inputLength">Number of input chars</param> - /// <param name="destPtr">Pointer to location for the first result byte</param> - /// <param name="destLength">Max length of the preallocated result buffer</param> - /// <returns>If the result buffer was not large enough to write all result bytes, return -1; - /// Otherwise return the number of result bytes actually produced.</returns> - private static unsafe Int32 FromBase64_Decode(Char* startInputPtr, Int32 inputLength, Byte* startDestPtr, Int32 destLength) { - - // You may find this method weird to look at. It’s written for performance, not aesthetics. - // You will find unrolled loops label jumps and bit manipulations. - - const UInt32 intA = (UInt32) 'A'; - const UInt32 inta = (UInt32) 'a'; - const UInt32 int0 = (UInt32) '0'; - const UInt32 intEq = (UInt32) '='; - const UInt32 intPlus = (UInt32) '+'; - const UInt32 intSlash = (UInt32) '/'; - const UInt32 intSpace = (UInt32) ' '; - const UInt32 intTab = (UInt32) '\t'; - const UInt32 intNLn = (UInt32) '\n'; - const UInt32 intCRt = (UInt32) '\r'; - const UInt32 intAtoZ = (UInt32) ('Z' - 'A'); // = ('z' - 'a') - const UInt32 int0to9 = (UInt32) ('9' - '0'); - - Char* inputPtr = startInputPtr; - Byte* destPtr = startDestPtr; - - // Pointers to the end of input and output: - Char* endInputPtr = inputPtr + inputLength; - Byte* endDestPtr = destPtr + destLength; - - // Current char code/value: - UInt32 currCode; - - // This 4-byte integer will contain the 4 codes of the current 4-char group. - // Eeach char codes for 6 bits = 24 bits. - // The remaining byte will be FF, we use it as a marker when 4 chars have been processed. - UInt32 currBlockCodes = 0x000000FFu; - - unchecked { while (true) { - - // break when done: - if (inputPtr >= endInputPtr) - goto _AllInputConsumed; - - // Get current char: - currCode = (UInt32) (*inputPtr); - inputPtr++; - - // Determine current char code: - - if (currCode - intA <= intAtoZ) - currCode -= intA; - - else if (currCode - inta <= intAtoZ) - currCode -= (inta - 26u); - - else if (currCode - int0 <= int0to9) - currCode -= (int0 - 52u); - - else { - // Use the slower switch for less common cases: - switch(currCode) { - - // Significant chars: - case intPlus: currCode = 62u; - break; - - case intSlash: currCode = 63u; - break; - - // Legal no-value chars (we ignore these): - case intCRt: case intNLn: case intSpace: case intTab: - continue; - - // The equality char is only legal at the end of the input. - // Jump after the loop to make it easier for the JIT register predictor to do a good job for the loop itself: - case intEq: - goto _EqualityCharEncountered; - - // Other chars are illegal: - default: - throw new FormatException(Environment.GetResourceString("Format_BadBase64Char")); - } - } - - // Ok, we got the code. Save it: - currBlockCodes = (currBlockCodes << 6) | currCode; - - // Last bit in currBlockCodes will be on after in shifted right 4 times: - if ((currBlockCodes & 0x80000000u) != 0u) { - - if ((Int32) (endDestPtr - destPtr) < 3) - return -1; - - *(destPtr) = (Byte) (currBlockCodes >> 16); - *(destPtr + 1) = (Byte) (currBlockCodes >> 8); - *(destPtr + 2) = (Byte) (currBlockCodes); - destPtr += 3; - - currBlockCodes = 0x000000FFu; - } - - }} // unchecked while - - // 'd be nice to have an assert that we never get here, but CS0162: Unreachable code detected. - // Debug.Assert(false, "We only leave the above loop by jumping; should never get here."); - - // We jump here out of the loop if we hit an '=': - _EqualityCharEncountered: - - Debug.Assert(currCode == intEq); - - // Recall that inputPtr is now one position past where '=' was read. - // '=' can only be at the last input pos: - if (inputPtr == endInputPtr) { - - // Code is zero for trailing '=': - currBlockCodes <<= 6; - - // The '=' did not complete a 4-group. The input must be bad: - if ((currBlockCodes & 0x80000000u) == 0u) - throw new FormatException(Environment.GetResourceString("Format_BadBase64CharArrayLength")); - - if ((int)(endDestPtr - destPtr) < 2) // Autch! We underestimated the output length! - return -1; - - // We are good, store bytes form this past group. We had a single "=", so we take two bytes: - *(destPtr++) = (Byte) (currBlockCodes >> 16); - *(destPtr++) = (Byte) (currBlockCodes >> 8); - - currBlockCodes = 0x000000FFu; - - } else { // '=' can also be at the pre-last position iff the last is also a '=' excluding the white spaces: - - // We need to get rid of any intermediate white spaces. - // Otherwise we would be rejecting input such as "abc= =": - while (inputPtr < (endInputPtr - 1)) - { - Int32 lastChar = *(inputPtr); - if (lastChar != (Int32) ' ' && lastChar != (Int32) '\n' && lastChar != (Int32) '\r' && lastChar != (Int32) '\t') - break; - inputPtr++; - } - - if (inputPtr == (endInputPtr - 1) && *(inputPtr) == '=') { - - // Code is zero for each of the two '=': - currBlockCodes <<= 12; - - // The '=' did not complete a 4-group. The input must be bad: - if ((currBlockCodes & 0x80000000u) == 0u) - throw new FormatException(Environment.GetResourceString("Format_BadBase64CharArrayLength")); - - if ((Int32) (endDestPtr - destPtr) < 1) // Autch! We underestimated the output length! - return -1; - - // We are good, store bytes form this past group. We had a "==", so we take only one byte: - *(destPtr++) = (Byte) (currBlockCodes >> 16); - - currBlockCodes = 0x000000FFu; - - } else // '=' is not ok at places other than the end: - throw new FormatException(Environment.GetResourceString("Format_BadBase64Char")); - - } - - // We get here either from above or by jumping out of the loop: - _AllInputConsumed: - - // The last block of chars has less than 4 items - if (currBlockCodes != 0x000000FFu) - throw new FormatException(Environment.GetResourceString("Format_BadBase64CharArrayLength")); - - // Return how many bytes were actually recovered: - return (Int32) (destPtr - startDestPtr); - - } // Int32 FromBase64_Decode(...) - - - /// <summary> - /// Compute the number of bytes encoded in the specified Base 64 char array: - /// Walk the entire input counting white spaces and padding chars, then compute result length - /// based on 3 bytes per 4 chars. - /// </summary> - private static unsafe Int32 FromBase64_ComputeResultLength(Char* inputPtr, Int32 inputLength) { - - const UInt32 intEq = (UInt32) '='; - const UInt32 intSpace = (UInt32) ' '; - - Debug.Assert(0 <= inputLength); - - Char* inputEndPtr = inputPtr + inputLength; - Int32 usefulInputLength = inputLength; - Int32 padding = 0; - - while (inputPtr < inputEndPtr) { - - UInt32 c = (UInt32) (*inputPtr); - inputPtr++; - - // We want to be as fast as possible and filter out spaces with as few comparisons as possible. - // We end up accepting a number of illegal chars as legal white-space chars. - // This is ok: as soon as we hit them during actual decode we will recognise them as illegal and throw. - if (c <= intSpace) - usefulInputLength--; - - else if (c == intEq) { - usefulInputLength--; - padding++; - } - } - - Debug.Assert(0 <= usefulInputLength); - - // For legal input, we can assume that 0 <= padding < 3. But it may be more for illegal input. - // We will notice it at decode when we see a '=' at the wrong place. - Debug.Assert(0 <= padding); - - // Perf: reuse the variable that stored the number of '=' to store the number of bytes encoded by the - // last group that contains the '=': - if (padding != 0) { - - if (padding == 1) - padding = 2; - else if (padding == 2) - padding = 1; - else - throw new FormatException(Environment.GetResourceString("Format_BadBase64Char")); - } - - // Done: - return (usefulInputLength / 4) * 3 + padding; - } - - } // class Convert -} // namespace - |